Automatic plate valve



M. RI ESNEB.

AUTOMATIC PLATE VALVE.

Reissued Oct. 17, 1922.

APPLICATION FILED JULY 26.1922

Reissued Oct. 17, 1922..

'- UNITED STATES PATENT OFFICE.

MICHAEL RIESNER, OF CINCINNATI, OHIO, ASSIGNOR TO WORTHINGTON PUMP AND MACHINERY CORPORATION, A CORPORATION OF VIRGINIA.

au'roma'rxc PLATE VALVE.

Original application filed April 13, 1920, Serial No. 373,609.

OriginaINo. 1,417,690, dated May 30, 1922. Application for reissue filed July 26, 1922. Serial 110.

To all whom it may concern-.-

Be it known that I, MICHAEL RmsNER, a citizen of the United States, residing-at Cincinnati, county of Hamilton, State of 5 Ohio, have invented certain new and useful Improvements in Automatic Plate Valves, fully described and represented in the following specification and the accompanying drawings, forming a part of the same,

This invention relates especially to valve constructions of the type enerally set forth in the reissue patent to ll Ieyer, No. 13,991, August 2, 1915, that is to, say, valves con sistmg of thin elastic strips of metal which are so held at their ends that, when under fluid pressure, they bend at their centers towards and away from their ports to open and close the same.

The present invention has for its especial object to produce a construction employin valves of the type referred to, which sha be cheap to construct,which shall be efficient in oplerationandwhich resents advantages in t e matter of assem ling the construction. 7

With these and other objects not particularly referred to in view, the invention consists in certain constructlons, and in certain parts, improvements and combinations, as will be hereinafter fully described and then specifically pointed out.

Referring to the drawing- Figure 1 represents a vertical section of a part of the compressor embodying the im- 85 proved construction; 1

FiguresQ and 3 are, sections on the lines 2 -2 and 3-3, respectively, of the construc-- tion shown in Fig. 1;

Figure 4' is a horizontal section on the line 40 44- of Fig. 1;

Figures 5, 6 and 7 are detaiLviews. .Referring to the drawings which illustrate a concrete embodiment of the invention, 1 indicates a compressor casing having a compressor chamber or' cylinder 2- in which works a piston 3, the compressor having in let and outlet chambers and ports4 and 5. The compressor :chamber or cylinder is closed by a port plate 6 havirig cylinder ports 7 and 8 formed therein. 11 t e construction illustrated, the port 7 is formed at the bottom ofa recess in the outer side of the plate, and, in the construction shown,

is less in length and width than the recess, I

with the result that shoulders 9, which constitute a valve seat, are formed at the sides of the port, and valve supports 10 are formed at the ends of the port. In what are regarded as the best constructions, these shoulders 9 and valve supports 10 are formed on a curve which dips toward the transverse center of the port. The port 8 is formed atthe bottom of a recess cut in the inner side of the port plate 6 and this port, in the construction shown,-is also less in length and width than the recess, so as to Renewed March 2,1922, Serial No. 540,613;

form shoulders which constitute a seat for the valve and supports on which the valve rests at its ends, the seat and support also being formed on a curve. r

The valve consists of thin elastic strips 11 and 19 of metal which when properly held at their ends willflex at their centers to open andclose the ports. Where the spe- 'cific construction of inclined seats and supports, such as herein shown, are employed, the valve strips will be formed on a curve which corresponds to the curve of the seats and shoulders. This may readily be accomplished by passing the valve strlps through rolls which give them a set, so that they have the curve referred to.

7 Means are provided for holding or confining the valve strips at their ends so as to leave them free to flex at the centers to open and close in the manner characteristic of valves of the type referred to. While these may-vary, in the particular construction shown, for the valve strip 11 a cap 12 is provided, this cap having an inwardly close the same.

In the particular construction illustrated, for the valve strip 19 there is provided a slottedguard plate 16 which isv located between the port plate 6 and the compressor chamber, this plate being secured to the port plate by screws which (pass through holes 17 inthe guard plate an into the port plate. If desired, this guard late may be provided with a positioning ri as 18, which takes into a recess in the port plate 6, so that in assembling the screw holes 17 may be brought accurately into register with the corresponding screw holes in the port plate. The edge of this guard plate, as shown in Fig. 3, for instance, overlies the ends of the recess in which the port 8 is located, and the valve supports in said recess. This guard plate, therefore, which may, as shown,

be located on a shoulder, as 20, formed at the end of the compressor chamber, assists in holding the valve strip 19 at its ends but permits it to flex to open and close its ports.

If desired, means may be provided for limiting the flexing movement of the valve strips 11 and- 19. While these means may be varied, in the particular. construction shown,

the cap 12 has a downwardly projecting rib 21 against which the valve strip 11 will abut when it is opened to the desired extent. As shown, the opening or flexing movementpf the valve strip 19 is limited by an integral section 22 between the slots of the guard plate 16, this section being so positioned that the valve 19 will abut against it when it is opened to the desired extent. As shown, the port plate 6 is provided with inlet and outlet ports 23, 24 which communicate with the inlet and outlet ports 4, 5 and lead into chamber formed in the cap 12.

It will be understood that with. the conthe struction as described, the port plate, the valves, the cap and the guard plate can be easily assembled, and that the recesses'in which the thin flexible valve strips are located permit the same to be positioned ;in the structure during assembly without danger that they will become displaced while the rest of the parts are being put in position.

peci all It will be understood that changes and variations may be made in the construction herein shown and described without departing from the invention, and that the invention claimed is not confined to such construction. While the invention relates esscribe in which the valve plates flex for opening and closing-the ports, my improved port p te arrangementmay be used with plate valves of other types and .is thus claimed. V

What is claimed is: 1. The combination with a curved valve seat having valve supports at its ends, of

a thin, flexible, normally curved plate valve:

cooperating with said seat to open and close a port therethi'ough, the ends of the valve to valves of the type above de i normally resting freely on said supports, the

valve flexing during this opening and closingmovement and its ends being free to permit said flexing.

2. The combination with a valve seat having valve supports at its ends formed on a curve which dips toward the center of the port formed through the seat, of a thin normally curved plate 'valve cooperating with said seat to open and close the port therethrough, the ends of the valve normally resting freely on said supports, the valve- -to open and close the port.

4. A port plate having a recess therein, a port cut through the bottom of the recem of less length than the recess, whereby valve supports are formed at the ends of the ort which are below the surface of the p ate, said valve supports being inclined toward the center of the port, a normally curved thin flexible valve stripthe ends of which normally rest freely on said supports, and means for confining the strip at its ends on said supports, thereby, leaving the valve free to flex to open and close the port.

5. A port plate having a recess therein, a port cut through the bottom of the recess of less length and width than the recess, whereby shoulders which constitute a valve seat are formed at the sides of the port and valve supports are formed at the ends of the port, a thin flexible valve strip the ends of which normally rest freely on said supports, and means for confining the valve at its ends on said supports, thereby leaving it free to flex to open and close. v

6. A port plate having a recess therein, a port of less length and width than the recess cut through the bottom of the recess, whereby shoulders which constitute a; valve seat are formed at. the sides of the port and valve supports are formed at the ends of the port, said shoulders and supports being formed on a curve which dips toward the center of the port, -a normally curved thin flexible valve strip the ends of which normally rest freely on said supports, and means for confining the valve at its ends on said supports thereby leaving it free to flex to open and close.

'7. A port plate having a recess therein, a port of less length than the length of the recess cut through the bottom of the recess,

whereby valve supports are formed at the ends of the port which are below the surface of the plate, a thin flexible valve strip the ends of which normally rest freely on said sup-ports, means for confining the valve at its ends on said supports, thereby leaving 1t free to flex to open and close,- and means for determining the opening movement of the valve.

8. A port plate having a recess there n, a port of less length. and width than the recess cut through the bottom of the recess, whereby shoulders which constitute a valve seat are formed atthe sides of theport, and valve supports are formed at the ends of the port, a thin flexible valve strip the ends of which normally rest freely on said supports, means for confining the valve at its ends on said supports, thereby leaving it free to flex to open and close, and means for determining the opening movement of the valve.

9. A port plate having a recesstherein, a port of less length and width than the recess cut through the bottom of the recess, where by shoulders which constitute a valve seat are formed at the sides of the port and valve supports are formed at the ends of the port, said shoulders and supports being formed on a curve which dips toward the center of the port, a normally curved flexible valve strip the ends of which normally rest freely on said supports, means for confining the valve strips at its ends on said supports, whereby it is left freetoflex to open and close, and means forv determining the opening movement of the valve.

10. The combination with a cylinder and its piston, of a port plate having recesses in opposite sides thereof, ports-of less length and width than the recesses cut through the bottom, whereby shoulders which constitute a valve seat are formed at the sides of the ports, and valve supports are formed at the ends of the rts, said supports and shoulders being t di'med on a curve which dips toward the center of the ports, normally curved flexible valve strips the ends of which normally rest freely on said supports, and means for confining the valve strips at their ends, thereby leaving them free to flex to open and close.

11. The combination with a cylinder and its piston, of a port plate having recesses in opposite sides ther'eofi, ports less in length and width than the recesses cut through the bottoms thereof, whereby shoulders which constitute a valve seat are formed at the normally curved flexible valve strips the ends of which normally rest freely on said supports, means for confining the valve strips at their ends, thereby leaving them free to flex to open and close, and means for determining the opening movement of bottoms thereof, whereby shoulders which constitute valve seats are formed at the sides of the ports and valve supports at the ends of the ports, said supports and seats being formed on a curve which dips toward the center of the ports,-flexible valve strips on the supports, a slotted guard plate between the port plate and the chamber in the cylinder, said plate confining the valve strip on the inner side of the plate port to the supports but leaving it free to flex to open and having a section which determines the opening movement of the valve strip, and a cap covering the port plate, said cap confining the end of the valve strip in the recess on the outer side of the plate to its supports and having a rib which determines the opening movement of the valve strip.

13. A port plate having a recess therein, a port cut through the bottom of the recess of less length and width than the recess, whereby shoulders which constitute a valve seat 'are formed at the sides of the port and valve supports are formedat the ends of the port, a valve strip the ends of which normally rest freely on said supports, and means for confining the valve at its ends on said supports.

14. A port plate havihg a recess therein, a port of less length than the length of the recess'cut through the bo-ttomof the recess,

whereby valve supports are formed at the ends of the port which are below the surface of the plate, a valve strip the ends of which normally rest freely on said supports, means for confining the valve at its ends on said,

port, a valve, strip the ends of which normally I rest freely on said supports, means for confining the valve at its ends on said supports, and means for determining the opening movement of the valve.

16. The combination with cylinder 2,of guard plate 16 on the cylinder head having 1nlet and exhaust ports, port plate 6 outside said guard plate having inlet and exhaust ports and valve seats, and plate valves 11, 19 seating'on said-seats within the op-- posite faces of the plate.

17. A valve scat having a concave surface,

a normally curved plate valve of thin elastic material seating on said concave surface, and

means for loosely confining said valve while permitting flexing in the direction tending to straighten the valve in opening.

18. A valve seat having a concave surface, a normally curved plate valve of thin elastic material seating on said concave surface, and a cap loosely confining the valve to permit flexing in the direction tending to straighten the valve in opening and limiting the opening movement of the valve. I

19. An automatic plate valve, comprising a valve seat, and a thin flexible normally curved plate valve cooperating with said seat to open and close a port therethrough, the

form flexing of the valve during the open-4.

ing and closing movements.

20. An automatic plate valve, comprising ai seat having a port,v a guard having a port, and a permanently flexed plate valve interposed between said seat and guard.

21. An automatic plate valve comprising a seat having a port, a guard having a port, and an elongated permanently flexd plate valve curved in the direction of its length and interposed between said seat and ard.

In witness whereof I hereunto a x my signature.

MICHAEL RIESNER. 

